chore(deps): bump league/commonmark from 2.7.0 to 2.7.1 (#490)

Bumps [league/commonmark](https://github.com/thephpleague/commonmark) from 2.7.0 to 2.7.1.
- [Release notes](https://github.com/thephpleague/commonmark/releases)
- [Changelog](https://github.com/thephpleague/commonmark/blob/2.7/CHANGELOG.md)
- [Commits](thephpleague/commonmark@2.7.0...2.7.1)

---
updated-dependencies:
- dependency-name: league/commonmark
  dependency-version: 2.7.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]